I've got you on this one...kind of. I have used an earlier version of the Roadie, and I have also been sent versions of the Jowoom Smart Tuner.
The Roadie absolutely works, and there is also a bass version. I prefer the Jowoom, but not because I was sent review models.
Someone at Roadie, at one point, wrote a very angry note to me about a past review. I never heard from the company again, though I did recently request the opportunity to review their Roadie Coach--I may not hear back from them, as I support the Jowoom over the Roadie tuner for what I do. (I have been thinking that the Roadie Coach, it if works as stated, might be a great solution for doing ukulele reviews).
For the record, I bought the Roadie for my school and over the years have also bought some Jowooms. When I present at music education conferences, I show the Jowoom.
The Roadiewould do what it said; but occasionally would flip out and start winding like crazy. When I contacted customer support, they wanted me to program a tuning profile for every instrument. That's not realistic in my school setting (40 student ukuleles, not counting any of my own) or even my personal collection (more than 40). It was also a lot of button presses on the device to make things happen. But it is much better for a wide collection of string instruments including things like taropatch and eight string ukuleles.
The Jowoom is heavier, can occasionally spin like the Roadie (less frequently), has a longer lasting battery (it is larger, like a small water pistol...which made going through TSA kind of interesting last year for music education conferences) but most importantly it has a full auto mode, where you set it to ukulele tuning, and when you turn it on, it remains there and and you can just go from string to string. The Jowoom also works better as a string winder. And it is cheaper. So for a school teacher, like myself, it is a winner. I did have one person contact me who bought one who then tested the tuning against another tuner (like a peterson strobe tuner) and they felt that the Jowoom wasn't as accurate. It is certainly close enough for classroom settings, where instruments are going to go out of tune almost instantly, and
I don't have any ill will towards Roadie (even with the angry e-mail) and would happily review any model and send it back after the review.
I'll include some videos below:
Roadie 2 Tuner Review (2018):
Jowoom and Roadie Tuner Thoughts (2019):
Tuning 40 Ukuleles with the Jowoom this past year (2022)